Daniel i



(No Mod el I i D. I.-GALH OUN. .EXOAVATING scoor.

No. 575,874. Patented-Jan. 26,1897,

UNITED STATES PATENT OFFICE.

I DANIEL-1. CALHOUN, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE CALHOUN EXCAVATIN G COMPANY, OF SAME PLACE.

EXCAVATlNG-SCOOP.

SPECIFICATION forming part of Letters Patent No. 575,874, dated January 26, 1897. Application filed September 30,1895. Serial No. 564,089. (No 'model.)

' To all whom it mat concern: correspond to similar bars shown and dev Be it known that I, DANIEL I. CALHOUN, a scribed in the prior patent above referred to, citizen of the United States of America, rebut as shown in that patent the outer ends of siding at Chicago, in the county of Cook the two bars were connected by an integrally- 5 and State of Illinois, have invented certain formed transverse bar fixing their relation to new and useful Improvements in Excavatingeach other. It has been found in practice Scoops, of which the following is a specificathat the integrallyformed transverse bar tion. lying across the opening or throat of the scoop My invention relates to improvements in tends somewhat to impede or contract the 1o excavating-scoops, and more particularly to throat and is for that reason objectionable, improvements in means for regulatingthe poand in my pending application, Serial No. sition of the supporting bars and bails of such 560,192, I have shown and described a means scoops, together with means for releasing the of obviating this difficulty by offsetting the same to permit tilting of the scoops. integral transverse bar, so as to throw it back r 5 The invention is fully described and eX- to the rear or upper margin of the opening or plained in this specification and shown in the throat of the scoop. accompanying drawings, in which While the offset bar is perfectly practical Figure 1 is a side elevation of a scoop emand satisfactory in its operation, it adds conbodying my improvements, the scoop being siderably to the weight of the scoop designed 7o 20 supported in its upright or filled position. for heavy work, and it is, furthermore, an in- Fig. 2 is a front elevation of the scoop shown expensive piece to forge, and one of the obin Fig. 1, the view being in the direction in jects of this invention is to accomplish the dicated by the arrow 2, Fig. 1. Fig. 3 is an purpose for which the transverse bar is deinternal side elevation of one of the side walls signed without the extra weight of material z 5 of the scoop, showing the relation of the supand expense of labor involved in the use of porting bars and bail, the locking mechanthe transverse bar. To that end the bail C ism, and the tripping crank-lever. Fig. 4 is has at each of its ends a reduced shank C, an oblique plan of the parts shown in Fig. 3, passing transversely through the end of the the view being in the direction indicated by corresponding bar B, the end of the bail be- 30 the arrow 4 in Fig. 3. Fig. 5 is a side elevaing likewise formed with a square shoulder tion of the locking-lever and the parts conlying in contact with the inner face of the nected therewith,showinga modified arrangebar. The outer end of the shank is provided ment of spring for holding the cranked lever with any means for holding the bar in place and locking-lever in place. and preventing the longitudinal movement of 8 5 3 5 In the views, A Aare the side pieces, and A the shank therein, as, forinstance, with a nut is the curved bottom and rear wall of a scoop or block 0 and a pin 0 passing through the having the general form and construction nut and shank, as shown in detail in Fig. 4. 1 shown in my prior patent, No. 506,667, the It is evident that the construction of the bail rear end or base of each side piece being apshown and described must hold the free ends 4o proximately a segment of the circle and the of the bars B B at a constant distance from two side pieces being firmly joined by the each other, the spreading of the bars or the wall A; To the side walls A A are pivoted, pressure of the bars against the walls A A of respectively, two supporting-bars B B, prefthe scoop beingeffectually prevented. This erably of such length as to extend a short construction dispenses entirely with the 5 distance beyond the edges of the side pieces transverse integral bar connecting the pivin every position of the scoop, as shown in oted bars B B and leaves the throat of the Fig. 1, and in the free ends of the bars B B scoop perfectly free and open throughout its are pivoted the respective ends of a bail C, entire extent. adapted to be hung upon a hook or otherwise In the operation of this scoop it is neces- 50 connected with suitable means of draft for sary to fill it, to lift'and carry it, and finally filling and lifting the scoop. The bars B B to invert and dump it, and for this purpose it is necessary to provide means for locking the bars B B in a certain relation to the scoop when the latter is filled and in its upright position. Such means are shown in the figures of the drawings, in which D is a lever pivoted at or near the upper edge of each of the side pieces A A and swinging in a vertical plane, and b is a block or lug fastened to theinner face of each of the bars B B, the forward end of each lever D being adapted when in one position to abut against the corresponding block b. A transverse cranked lever E is pivoted at its ends to extensions a a on the inner faces of the side pieces and has at each end a foot E, lying beneath'the rear end of the'corresponding lever D. The normal position ,of the crank-lever E is that shown in side elevation in Figs. 1 and 3, the cranked central part of the lever being approximately at right angles to the edges of the side pieces and the foot E at each end of the lever being parallel to the edge of the corresponding side piece, and a spring S, of any suitable construction and arrangement, tends to hold the crank-lever in its normal position.

Then the scoop is filled and is moving toward the point at which it is to be dumped, its motion is in the direction indicated by the arrow 5 in Fig. 1, and the track on which the scoop moves is provided with a suitable stop so placed that the central portion of the crank-lever may strike it and be swung in the direction indicated by the arrow 2 in Fig. 1, thereby swinging the foot E at each end of the crank-lever upward, raising the rear end of the corresponding lever D and depressing the front end thereof, so as to free it from the lug or block Z). As soon as this is accomplished the weight of the loaded scoop swings it forward and downward to the position shown in dotted lines in Fig. 1, thereby dumping the contents of the scoop. As

soon as the cranked lever E is released from pieces A A shown in Fig. 1, whereupon the lovers D D come again in looking relation to the blocks 1) b, and the bars B B are thereby again secured in position to lift and carry the scoop to the dumping-point.

In Fig. 5 the spring S, instead of being applied directly to the cranked lever E, is mounted upon the pivot of the locking-lever D, and one of its ends presses downward upon the rear end of the locking-lever which rests upon the foot E of the cranked'lever. The spring thus presses downward the end of the locking-lever and the foot of the cranked lever at the same time, and thus supplements the force of gravity which tends to hold the locking-lever in its normal position.

Having now described and explained my invention, what I claim as new, and desire to secure by Letters Patent, is

1. The combination with the-scoop and the bars pivoted to its side pieces and provided with suitable means for draft, of a verticallyswinging lever pivoted to the side piece of the scoop and adapted to abut against the corresponding pivoted bar or an attachment thereof and a cranked lever supported by the side pieces of the scraper and provided with a foot impinging upon said vertically-swinging lever, the movement of the crank-lever in one direction being adapted to swing'said vertically-moving lever out of engagement with said pivoted bar; substantially as and for the purpose set forth.

2. The combination with the scoop, of the bars, B, B, pivoted to the side pieces thereof and provided with means for draft, the levers, D, D, adapted to abut against said bars and the cranked lever, E, provided with feet, E, E, impinging upon the levers, D, D, and adapted in a certain movement of the cranklever to disengage the levers, D, D, from the bars, B, B, and permit inversion of the scoop.

The combination with the scoop, of the bars, B, B, the locking-levers, D, D, adapted to abut against said bars, the cranked lever, E, provided with feet, E, E, impinging upon the levers, D, D, and springs, S, S, adapted to hold the locking-levers, D, D, and cranked levers, E, E, in their normal position.

DANIEL I. CALHOUN.

YVitn esses:

B. IT; WILEs,

CHAs. O. SHERVEY. 

